The acting was so natural-so glad that "no-name" actors were used & different characters kept really minimal. I thought the build up & pace were great--not slow as some others may have thought. We're so used to explosive, rapid developments that we seem to have lost all patience for things to develop more slowly. The special effects were great-not over the top but still really scary. Definitely scary, I usually don't get scared easily, this was a good one.